EP0321346B1 - Mit Gewinde vesehener Gegenstand, z.B. eine Schraube, und Verbindung von Teilen mit Hilfe dieses Gegenstands - Google Patents

Mit Gewinde vesehener Gegenstand, z.B. eine Schraube, und Verbindung von Teilen mit Hilfe dieses Gegenstands Download PDF

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Publication number
EP0321346B1
EP0321346B1 EP88403195A EP88403195A EP0321346B1 EP 0321346 B1 EP0321346 B1 EP 0321346B1 EP 88403195 A EP88403195 A EP 88403195A EP 88403195 A EP88403195 A EP 88403195A EP 0321346 B1 EP0321346 B1 EP 0321346B1
Authority
EP
European Patent Office
Prior art keywords
thread
circle
arcs
threaded element
radius
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88403195A
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English (en)
French (fr)
Other versions
EP0321346A1 (de
Inventor
Jean-Claude Frèrejacques
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Simmonds SA
Original Assignee
Simmonds SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Simmonds SA filed Critical Simmonds SA
Priority to AT88403195T priority Critical patent/ATE63982T1/de
Publication of EP0321346A1 publication Critical patent/EP0321346A1/de
Application granted granted Critical
Publication of EP0321346B1 publication Critical patent/EP0321346B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler
    • Y10T403/5746—Continuous thread

Definitions

  • the present invention essentially relates to an improved threaded element, such as for example a male threaded element forming a screw.
  • a helical thread has a bottom which may have, in section along a plane containing the axis of the threaded element, a rounded or arcuate shape tangentially joining the blanks of the thread, as appears in documents US-A-3,433,117 and US-A-4,040,327.
  • the present invention aims to remedy these drawbacks by proposing a threaded element whose bottom of the helical thread is such that the maximum stress at the bottom of the thread is considerably reduced, which makes it possible to increase the duration of use or the load of the assemblies, and which, at the same time significantly improves the security sought for them.
  • the invention relates to a threaded element, such as for example a male threaded element forming a screw, comprising at least one helical thread, the bottom of which has, in section along a plane containing the axis of the threaded element, a rounded or arcuate shape tangentially joining the blanks of the thread, characterized in that said bottom of the net, seen along the said section, comprises three arcs of circle which consist of two arcs of circle of equal radii tangentially connected to the blanks of the net and, of an arc of circle of different radius tangentially connected to the two arcs of circle of equal radii.
  • the radius of the two circular arcs of equal radii is equal to 0.095 x pitch of the thread of the threaded element, these two circular arcs each comprising a connection point to the blanks of the thread whose distance to the axis of symmetry of the threaded element is equal to 0.156 times the pitch of the thread, while the centers of these two arcs of circle of equal radii are located on a straight line perpendicular to the blank of the thread at the level of the said connection point, the radii of the two arcs of a circle being defined by the distance between their aforementioned centers and said connection point.
  • the middle circular arc tangentially connecting to the two circular arcs of above-mentioned equal radii has a center located on the axis of symmetry of the thread at a distance equal to 1.57 times the radius of the two circular arcs of equal radii, this distance being counted from the intersection of these radii with said axis of symmetry.
  • the particular shape of the bottom of the thread of the threaded element according to this invention advantageously leads to a reduction in stresses which is greater than 10%.
  • a threaded element 1 which can take, for example, the shape of a screw, and which comprises a helical thread F comprising blanks 2 to which a rounded connection 3 tangentially connects forming the bottom of the thread F.
  • the bottom 3 of the net consists of three arcs of a circle, namely two arcs of a circle 4 of equal radii tangentially connected to the blanks 2 of the net, and a mid-circle arc of different radius and tangentially connected to two arcs 4 of equal radius.
  • An optimal threading profile has therefore been produced according to the invention thanks to three arcs of a circle forming the bottom of the thread and as defined above, so as to significantly reduce the stress rate in the threaded element at the thread .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)
  • Forging (AREA)
  • Pens And Brushes (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Rotary Pumps (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Claims (4)

1. Gewindeelement, wie zum Beispiel ein mit Aussengewinde versehenes, eine Schraube bildendes Element mit wenigstens einem Wendelgewinde (F), dessen Grund (3) im Schnitt entlang einer die Achse des Gewindeelementes (1) enthaltenden Ebene eine sich tangential an die Flanken (2) des Gewindes anschliessende abgerundete Gestalt aufweist, dadurch gekennzeichnet, dass der besagte Gewindegrund (3) entlang des besagten Schnittes gesehen drei Kreisbogen (4, 5) aufweist, die sich aus zwei tangential an die Flanken (2) des Gewindes angeschlossene Kreisbogen (4) mit gleichen Halbmessern (r₁) und aus einem tangential an die beiden Kreisbogen (4) mit gleichen Halbmessern angeschlossenen mittleren Kreisbogen (5) mit einem unterschiedlichen Radius (r₂) zusammensetzen.
2. Gewindeelement nach Anspruch 1, dadurch gekennzeichnet, dass der Radius (r₁) der beiden Kreisbogen (4) mit gleichen Halbmessern derart ist, dass r₁ = 0,095 x Gewindeteilung des Gewindeelements (1), wobei diese beiden Kreisbogen (4) jeweils einen Punkt (Z) zum Anschluss an die Gewindeflanke aufweisen, dessen Entfernung (D) von der Symmetrieachse (X-X′) des Gewindes gleich 0,156 mal die Gewindeteilung ist, während die Mittelpunkte (O₁) der Kreisbogen mit dem Radius (r₁) auf einersenkrecht zur Gewindeflanke (2) in Höhe des Anschlusspunktes (Z) verlaufenden Geraden liegen, wobei der besagte Radius (r₁) durch en Abstand (O₁Z) bestimmt wird.
3. Gewindeelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der sich tangential an die beiden Kreisbogen mit dem Radius (r₁) anschliessende mittlere Kreisbogen (5) mit dem Radius (r₂) einen Mittelpunkt (O₂) besitzt, der auf der Symmetrieachse (X-X′) des Gewindes in einem Abstand A wie A = 1,57r₁ gerechnet von dem Schnittpunkt (I) zwischen den beiden Halbmessern (r₁) mit der besagten Symmetrieachse liegt.
4. Zusammenbau von irgendwelchen Werkstücken mit Hilfe von wenigstens einem Gewindeelement gemäss einem der Ansprüche 1 bis 3.
EP88403195A 1987-12-18 1988-12-15 Mit Gewinde vesehener Gegenstand, z.B. eine Schraube, und Verbindung von Teilen mit Hilfe dieses Gegenstands Expired - Lifetime EP0321346B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88403195T ATE63982T1 (de) 1987-12-18 1988-12-15 Mit gewinde vesehener gegenstand, z.b. eine schraube, und verbindung von teilen mit hilfe dieses gegenstands.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717774 1987-12-18
FR8717774A FR2624931B1 (fr) 1987-12-18 1987-12-18 Element filete perfectionne formant par exemple une vis, et assemblage de pieces realise a l'aide de cet element

Publications (2)

Publication Number Publication Date
EP0321346A1 EP0321346A1 (de) 1989-06-21
EP0321346B1 true EP0321346B1 (de) 1991-05-29

Family

ID=9358069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88403195A Expired - Lifetime EP0321346B1 (de) 1987-12-18 1988-12-15 Mit Gewinde vesehener Gegenstand, z.B. eine Schraube, und Verbindung von Teilen mit Hilfe dieses Gegenstands

Country Status (7)

Country Link
US (1) US4861210A (de)
EP (1) EP0321346B1 (de)
AT (1) ATE63982T1 (de)
DE (1) DE3863065D1 (de)
ES (1) ES2023005B3 (de)
FR (1) FR2624931B1 (de)
GR (1) GR3002469T3 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056611A (en) * 1990-05-29 1991-10-15 Galloway Trust Screw thread structure
US5163523A (en) * 1990-05-29 1992-11-17 Sandvik Rock Tools, Inc. Screw thread structure for percussion drill driver sub and case
US5060740A (en) * 1990-05-29 1991-10-29 Sandvik Rock Tools, Inc. Screw thread coupling
DE4342415C2 (de) * 1993-12-13 1998-04-16 Haerle Anton Spannungsoptimiertes Gewindeprofil
US5800107A (en) * 1996-04-19 1998-09-01 Giannuzzi; Louis N. Self-tapping, screw-type masonry anchor
FR2807138B1 (fr) * 2000-03-31 2002-05-17 Vallourec Mannesmann Oil & Gas Element filete tubulaire pour joint filete tubulaire resistant a la fatigue et joint filete tubulaire resultant
EP1601883B1 (de) * 2003-02-20 2007-12-12 Conti Fasteners AG Schneidschraube für die verwendung in gering dehnbaren materialien
NL1024889C1 (nl) * 2003-11-26 2005-05-27 Ihc Holland Nv Schroefdraad-verbinding in het bijzonder tussen een as en een daarop te bevestigen onderdeel.
US20100018699A1 (en) * 2007-03-21 2010-01-28 Hall David R Low Stress Threadform with a Non-conic Section Curve
SE530158C2 (sv) * 2007-06-05 2008-03-11 Sandvik Intellectual Property Bergborrutrustning samt hon- och handelar därtill
DE102008047060B4 (de) 2008-09-12 2011-05-26 Tracto-Technik Gmbh & Co. Kg Gewindeverbindung
GB2470404B (en) * 2009-05-22 2014-03-19 Phillips Screw Co Low energy screws for wood and similar materials
SG179322A1 (en) * 2010-10-01 2012-04-27 Infastech Ip Pte Ltd Threaded fastener
SE535814C2 (sv) * 2011-05-20 2013-01-02 Atlas Copco Secoroc Ab Gänganordning, gängförband samt borrsträngskomponent för slående bergborrning
JP6017944B2 (ja) * 2011-12-09 2016-11-02 国立研究開発法人物質・材料研究機構 高力ボルト及びその製造方法
US9404524B2 (en) * 2013-07-19 2016-08-02 Conti Fasteners High performance thread rolling screw/bolt for use in an unthreaded nut anchor
US10662722B2 (en) 2014-06-13 2020-05-26 Schlumberger Technology Corporation Threaded connections and downhole tools incorporating the same
US10145496B2 (en) * 2014-06-13 2018-12-04 Schlumberger Technology Corporation Rotary shouldered connections and thread design
US10160033B2 (en) 2014-06-23 2018-12-25 Schlumberger Technology Corporation Cold rolling devices and cold rolled rotary shouldered connection threads
US9874058B2 (en) 2014-07-31 2018-01-23 Baker Hughes, A Ge Company, Llc Fatigue resistant thread profile with combined curve rounding
US20170254352A1 (en) * 2014-11-13 2017-09-07 Essence Method Refine Co., Ltd. Fastener
US10669787B2 (en) * 2016-12-09 2020-06-02 Schlumberger Technology Corporation Pump rod connection
DE102017214625A1 (de) * 2017-08-22 2019-02-28 Robert Bosch Gmbh Zündkerze mit verbesserter Gewindegeometrie
US11382724B2 (en) 2017-10-11 2022-07-12 Evollution Ip Holdings, Inc. Three-dimensional stabilization thread form for dental implants
US11204057B2 (en) * 2019-07-16 2021-12-21 Dennis Sherlin Optimized thread profile for joining composite materials
DE102019130009A1 (de) * 2019-11-07 2021-05-12 EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge Werkzeug zur spanlosen Erzeugung oder Nachbearbeitung eines Gewindes, Verfahren zum Herstellen des Werkzeugs und Verfahren zum Herstellen eines Gewindes
CN112576594B (zh) * 2020-12-07 2022-01-11 泰尔重工股份有限公司 一种大牙底圆角匀强度螺纹及其加工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040327A (en) * 1959-09-28 1962-06-26 Powers Wire Products Company I Fastener driving and dimpling tool
FR1422358A (fr) * 1964-11-13 1965-12-24 Semt Procédé de réalisation d'assemblages ou d'emmanchements d'au moins deux pièces soumises à des vibrations ou analogues
US3433117A (en) * 1967-06-05 1969-03-18 Standard Pressed Steel Co High fatigue bolt thread
FR1589613A (de) * 1968-10-21 1970-03-31
JPS5329780B2 (de) * 1974-09-20 1978-08-23
US4549754A (en) * 1983-06-20 1985-10-29 Reed Tubular Products Company Tool joint
US4799844A (en) * 1988-01-11 1989-01-24 Trw Inc Elliptical thread design

Also Published As

Publication number Publication date
GR3002469T3 (en) 1992-12-30
FR2624931A1 (fr) 1989-06-23
ATE63982T1 (de) 1991-06-15
US4861210A (en) 1989-08-29
DE3863065D1 (de) 1991-07-04
EP0321346A1 (de) 1989-06-21
FR2624931B1 (fr) 1990-06-01
ES2023005B3 (es) 1991-12-16

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